E. E. Cummings
self-portrait

(...)
By 1918 Cummings had created his own poetic style. Because he was a painter as well as a poet, he had developed a unique form of literary cubism: he broke up his material on the page to present it in a new, visually directed way. Some of his poems had to be seen in their printed arrangement before they could be completely understood. "The day of the spoken lyric is past," he proclaimed. "The poem which has at last taken its place does not sing itself; it builds itself, three dimensionally, gradually, subtly, in the consciousness of the experiencer."
In addition, Cummings expressed ideas through new grammatical usage: he employed verbs as nouns, and other locutions as new linguistic creations (for example, "wherelings, whenlings / daughters of ifbut offspring of hopefear / sons of unless and children of almost / never shall guess"). He indulged in free play with punctuation and capitalization. Lowercase letters were the rule; capitals were used only for special emphasis; punctuation marks were omitted for ambiguous statement; others were introduced for jarring effects. His use of the lowercase letter "i" not only became a well-known means of self-reference in his work, but also reflected a role that he created for himself: he was the underling, the unnoticed dreamer, the downtrodden one, the child in the man; yet by asserting his individuality in this way, he thrust himself forward and established a memorable persona. [Richard S. Kennedy - Dreams in the Mirror]